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4 years ago

Why can polar water molecules pass through a cell membrane?

1 answer:

5 0

<span> Through osmosis because the membrane is partially permeable, osmosis is the movement of water molecules from a region of lower solute concentration to a higher solute concentration.
is the answer
</span>

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I am learning about Natural vs. Synthetic

Rashid [163]

Answer:

2) some fake skin stuff is made to practice sticthces, tattoos, or injections

i dont really know the rest sorry

6 0

3 years ago

Read 2 more answers

The balanced combustion reaction for C6H6 is 2C6H6(l)+15O2(g)⟶12CO2(g)+6H2O(l)+6542 kJ If 8.600 g C6H6 is burned and the heat pr

jenyasd209 [6]

Answer : The final temperature of the water is, $22.5166^oC$

Explanation : Given,

Mass of benzene = 8.600 g

Molar mass of benzene = 78 g/mole

First we have to calculate the moles of benzene.

$\text{Moles of benzene}=\frac{\text{Mass of benzene}}{\text{Molar mass of benzene}}=\frac{8.600g}{78g/mol}=0.1103mole$

Now we have to calculate the energy of combustion.

The given balanced chemical reaction is:

$2C_6H_6(l)+15O_2(g)\rightarrow 12CO_2(g)+6H_2O(l)+6542 kJ$

According to reaction,

As, 2 moles of benzene gives 6542 kJ of energy on combustion.

So, 0.1103 mole of benzene gives $\frac{6542 kJ}{2}\times 0.1103=360.7913kJ$ of energy on combustion.

Now we have to calculate the final temperature of the water.

Formula used : $q_w=m_w\times c_w\times \Delta T=m_w\times c_w\times (T_{final}-T_{initial})$

where,

$q_w$ = heat released = 360.7913 kJ = 36079.13 J

$m_w$ = mass of water = 5691 g

$c_w$ = specific heat of water= $4.18J/g^oC$

$T_{final}$ = final temperature = ?

$T_{initial}$ = initial temperature = $21^oC$

Now put all the given values in the above formula, we get:

$36079.13J=5691g\times 4.18J/g^oC\times (T_{final}-21^oC)$

$T_{final}=22.5166^oC$

Therefore, the final temperature of the water is, $22.5166^oC$

8 0

4 years ago

Which measurement density or conductance do you believe gives a more accurate method to determine the salt concentration of a so

lakkis [162]

<span>Conductance gives a more accurate method to determine the salt concentration of a solution.Conductivity would be used with conductors such as metals that include copper and silver.Conductivity is a measure of water's capability to pass electrical flow. This ability is directly related to the concentration of ions in the water. These conductive ions come from dissolved salts and inorganic materials such as alkalis, chlorides, sulfides and carbonate compounds</span>

8 0

4 years ago

This is an underground level where the ground becomes saturated with water.

ozzi

Answer: Pumping can affect the level of the water table. In an aquifer, the soil and rock is saturated with water.

Explanation:

8 0

3 years ago

Read 2 more answers

Element X reacts with copper to form the compounds and . In which group on the Periodic Table is element X found? A) Group 1 B)

tatuchka [14]

Copper oxide
element x is oxygen location,group 16

6 0

4 years ago